Spring talk...

These are the springs recommended to have in your box (softest to hardest):
Front: Grey, Black, Pink
Rear: Yellow, orange, Red

Kit Springs are Black Front and Orange Rear, so if you buy the .4 kit, you'll have 2 of the 6 pairs right away.

Remember these are the Low Frequency (LF) springs and they work with the older versions of this car too. So even if you aren't in the market for a .4 yet, I suggest grabbing the springs.